PIC16C62X
FIGURE 3-1:
BLOCK DIAGRAM
Data Memory
(RAM)
80 x 8
96 x 8
96 x 8
80 x 8
96 x 8
128 x 8
128 x 8
Device
PIC16C620
PIC16C620A
PIC16CR620A
PIC16C621
PIC16C621A
PIC16C622
PIC16C622A
Program Memory
512 x 14
512 x 14
512 x 14
1K x 14
1K x 14
2K x 14
2K x 14
13
Program Counter
EPROM
Program
Memory
Program
Bus
8 Level Stack
(13-bit)
Data Bus
8
Voltage
Reference
RAM
File
Registers
RAM Addr
(1)
9
Comparator
RA0/AN0
Indirect
Addr
-
+
14
Instruction reg
Direct Addr
7
Addr MUX
8
RA1/AN1
RA2/AN2/V
REF
RA3/AN3
FSR reg
STATUS reg
-
+
TMR0
3
Power-up
Timer
Instruction
Decode &
Control
Timing
Generation
OSC1/CLKIN
OSC2/CLKOUT
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
ALU
MUX
RA4/T0CKI
W reg
I/O Ports
PORTB
MCLR
V
DD
, V
SS
Note 1: Higher order bits are from the STATUS register.
DS30235G-page 10
Preliminary
©
1998 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
